Why Underwear Rides Up and How Design Prevents It
Underwear rides up when the leg opening elastic loses tension, the fabric has too much stretch, or the cut does not match the wearer's hip and waist measurements. The 2024 shapewear and underwear market report from Grand View Research notes that seamless construction and silicone-grip leg bands are the primary engineering solutions to reduce riding. Brands such as ThirdLove, Soma, and Commando publish fit guides that use hip-to-waist ratio and inseam length to assign sizes, a method that reduces returns linked to ride-up according to their public e-commerce data read more.
Fabric composition directly affects ride-up. Nylon and elastane blends maintain shape better than pure cotton, while microfiber and modal fabrics reduce friction against the skin. The Federal Trade Commission requires fiber content labeling on underwear in the United States, so consumers can verify claims about stretch and recovery by checking the label source.
Materials, Technologies, and Fit Systems Used by Major Brands
Silicone Grip Bands and Laser-Cut Leg Openings
Silicone grip bands sewn inside the leg opening create friction against the skin to hold the garment in place. ThirdLove's 2024 product line uses a double-layer silicone band on its signature briefs, a feature the company describes as its primary anti-ride-up technology ThirdLove. Soma's Smoothies collection uses laser-cut leg openings without elastic, which eliminates the rolled waistband that often migrates upward.
Moisture-Wicking and Four-Way Stretch Fabrics
Four-way stretch fabrics move with the body and recover after stretching, reducing the slack that causes ride-up. Brands such as Commando use nylon-spandex blends with moisture-wicking treatments in their anti-ride underwear lines. The global synthetic fibers market, which includes nylon and elastane used in underwear, was valued at over 80 billion dollars in 2023, according to Allied Market Research source.
Size Charts and Hip-to-Waist Ratio Systems
Brands that use hip-to-waist ratio systems instead of standard numeric sizes reduce fit issues. ThirdLove's Fit Finder quiz asks for hip and waist measurements to recommend sizes, a method the company says lowers ride-up complaints. Soma's size guide uses hip circumference and rise length as primary measurements, aligning with body-shape data from the market research firm NPD Group.
Seamless and Bonded Construction
Seamless knitting eliminates raised seams that can catch on skin or clothing and push the garment upward. Companies such as Knix and Soma use bonded seams and laser-cut edges in their no-ride-up underwear lines. Seamless knitting machines from Italian manufacturer Santoni are used by several U.S. and European brands to produce seamless underwear at scale.
Top-Rated Brands and Consumer Data on Ride-Up Prevention
Consumer review platforms such as The Good Trade and Wirecutter have ranked underwear lines based on ride-up prevention. The Good Trade's 2024 roundup lists ThirdLove, Soma, and Commando among the top brands for staying in place during movement. Wirecutter's testing methodology includes wear tests over multiple days and movement simulations to evaluate whether underwear rides up during walking, sitting, and bending